What will be the output of the following C++ code?

#include <vector> 
#include <algorithm>
#include <iostream>
#include <iterator>
using namespace std;
int square(int i) { return i * i; }
int main()
{
    vector<int> V, V2;
    V.push_back(0);
    V.push_back(1);
    V.push_back(2);
    transform(V.begin(), V.end(), back_inserter(V2), square);
    copy(V2.begin(), V2.end(), ostream_iterator<int>(cout, " "));
    cout << endl;
}